A rotating device for tracking solar energy

Abstract

The present invention relates to the technical field of solar energy resource utilization, and in particular to a rotating device for tracking solar energy, which includes a fixed seat, an active wheel and a driven wheel, a driving device, a heat collecting device and a heat dissipation device; the driving device includes a shape memory alloy, an active push rod, an active magnetic part and a driven magnetic part with the same magnetic poles; a driven spring is provided on the driven wheel; the heat collecting device includes a heat collecting cover; the heat collecting cover is provided with ventilation holes; and the heat dissipation device includes a sealing part that is slidably connected to the heat collecting cover. The present invention adopts shape memory alloy as a driving component, automatically rotates to track the sun, "eliminates motors" and "eliminates electricity", does not require external strong or weak electricity input, does not require an electric control system, does not require an additional power supply, automatically tracks the sun, and is energy-saving and environmentally friendly. No complex control system is required, the operation and maintenance are simple, the cost is low, and manpower and material resources are saved. The action process is completed purely mechanically, which is safe and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of solar energy resource utilization, and in particular to a rotating device for tracking solar energy. Background Art

[0002] Under the current tight energy situation, solar energy as a renewable clean energy is gaining more and more attention. However, due to the low density of solar energy and the changing direction of light, its utilization rate is relatively low. At present, traditional solar power generation and solar thermal equipment installed at fixed angles cannot track the changes in the position of the sun, and the utilization rate of solar energy is limited.

[0003] The existing solar automatic tracking system uses sensors to sense the position of the sun and controls the motor system through a frequency converter, PLC or single-chip microcomputer. The sensor outputs a signal, which is amplified and sent to the control unit. The control unit starts working and instructs the actuator to adjust the solar collector, thereby realizing the system's function of tracking the sun and improving the efficiency of solar energy utilization.

[0004] However, the existing solar automatic tracking system is relatively complex to control and operate, and requires regular professional maintenance, which is costly. Summary of the invention

[0005] The object of the present invention is to provide a rotating device for tracking solar energy to solve the technical problem of complex control operation existing in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a rotating device for tracking solar energy, comprising a fixed seat, a driving wheel and a driven wheel both in annular shape, a driving device, a heat collecting device and a heat dissipating device; the driving wheel and the driven wheel are coaxially arranged and are both rotatably connected to the fixed seat;

[0007] The driving device comprises a shape memory alloy, an active push rod, an active magnetic component and a driven magnetic component with the same magnetic poles; one end of the shape memory alloy is fixed to the active wheel, and the other end is fixed to the active magnetic component; the driven magnetic component is fixed to the driven wheel; when the other end of the shape memory alloy is extended and approaches the driven magnetic component, the repulsive force between the active magnetic component and the driven magnetic component can drive the active wheel to rotate;

[0008] The driven wheel is provided with a driven spring; one end of the active driving rod is fixed to the driving wheel; when the driving wheel rotates, the other end of the active driving rod can abut against the driven spring and compress the driven spring;

[0009] The heat collecting device comprises a heat collecting cover; the heat collecting cover is fixed to the driving wheel and covers the shape memory alloy; the heat collecting cover is provided with ventilation holes;

[0010] The heat dissipation device comprises a sealing member slidably connected to the heat collecting cover; the sealing member is used to seal the ventilation hole; the shape memory alloy is connected to the sealing member and is used to drive the sealing member away from the ventilation hole so as to open the ventilation hole.

[0011] Further, the heat collection device includes a condenser lens arranged on the top of the heat collection cover;

[0012] And / or, the heat collecting device includes a sunshade arranged on the top of the heat collecting cover; when the driving wheel rotates, the sunshade can block sunlight from shining on the concentrator.

[0013] Furthermore, the heat dissipation device includes a connecting rod, a return spring, and a fixing piece fixed to the driving wheel; the fixing piece is provided with a connecting hole; the connecting rod is slidably inserted into the connecting hole; the sealing piece is fixed to one end of the connecting rod, and one end of the return spring abuts against the sealing piece, and the other end of the return spring abuts against the fixing piece; when the shape memory alloy pushes the sealing piece away from the ventilation hole, the return spring is compressed.

[0014] Furthermore, ventilation holes are provided at both ends of the heat collecting cover; sealing members are provided at both ends of the connecting rod; the sealing member at one end is located inside the heat collecting cover, and the sealing member at the other end is located outside the heat collecting cover; the two sealing members are respectively located on the same side of the two ventilation holes, thereby sealing the two ventilation holes.

[0015] Furthermore, the fixing piece is in the shape of a circular ring; the fixing piece is sleeved outside the driving wheel and fixed inside the heat collecting cover; the shape memory alloy can pass through the inner ring hole of the fixing piece to perform reciprocating motion.

[0016] Furthermore, the active magnetic component and the driven magnetic component are respectively an active magnetic ring and a driven magnetic ring; and both the active magnetic ring and the driven magnetic ring are sleeved on the driving wheel.

[0017] Furthermore, a passive support rod is fixed on the driven wheel; and the driven magnetic ring is fixed on the passive support rod.

[0018] Furthermore, the shape memory alloy is in a spiral shape and is sleeved outside the driving wheel.

[0019] Furthermore, the heat collecting cover is cylindrical, and both ends of the heat collecting cover are provided with through holes; the heat collecting cover is fixed on the driving wheel through the through holes.

[0020] Furthermore, the sealing member is in the shape of a circular ring; the sealing member is sleeved outside the driving wheel.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects:

[0022] The rotating device for tracking solar energy provided by the present invention adopts shape memory alloy as a driving component, automatically rotates to track the sun, and is "motor-free" and "electrical-free". It does not require external strong or weak power input, an electric control system, or an additional power supply, and automatically tracks the sun, which is energy-saving and environmentally friendly. It does not require a complex control system, is simple to operate and maintain, is low in cost, and saves manpower and material resources. The action process is completed purely mechanically, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the structure of a rotating device for tracking solar energy provided by an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a heat collection device provided in an embodiment of the present invention;

[0026] Figure 3 Another schematic diagram of the structure of the heat collection device provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of a heat dissipation device provided in an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1-driving wheel; 2-heat collecting device; 3-driven wheel;

[0030] 4-active push rod; 5-driven spring; 6-fixed seat;

[0031] 7-passive support rod; 8-ventilation hole; 9-heat collecting cover;

[0032] 10-shape memory alloy; 11-pushing member; 12-active magnetic member;

[0033] 13- condenser; 14- light shielding plate; 15- driven magnetic part;

[0034] 16-perforation; 17-seal; 18-fixing member;

[0035] 19-reset spring; 20-connecting rod; 21-connecting hole. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The present invention is further explained below in conjunction with specific implementation modes.

[0040] like Figure 1-Figure 4 As shown, the rotating device for tracking solar energy provided in this embodiment includes a fixing seat 6, a driving wheel 1 and a driven wheel 3 both in annular shape, a driving device, a heat collecting device 2 and a heat dissipating device; the driving wheel 1 and the driven wheel 3 are coaxially arranged and are both rotatably connected to the fixing seat 6; the driving device includes a shape memory alloy 10, an active push rod 4, an active magnetic component 12 and a driven magnetic component 15 with the same magnetic poles; one end of the shape memory alloy 10 is fixed to the driving wheel 1, and the other end is fixed to the active magnetic component 12; the driven magnetic component 15 is fixed to the driven wheel 3; when the other end of the shape memory alloy 10 is extended and close to the driven magnetic component 15, the repulsive force between the active magnetic component 12 and the driven magnetic component 15 can drive the driving wheel 1 to rotate;

[0041] A driven spring 5 is provided on the driven wheel 3; one end of the active push rod 4 is fixed to the driving wheel 1; when the driving wheel 1 rotates, the other end of the active push rod 4 can abut against the driven spring 5 and compress the driven spring 5; the heat collecting device 2 includes a heat collecting cover 9; the heat collecting cover 9 is fixed to the driving wheel 1 and covers the outside of the shape memory alloy 10; a ventilation hole 8 is provided on the heat collecting cover 9; the heat dissipation device includes a sealing member 17 which is slidably connected to the heat collecting cover 9; the sealing member 17 is used to seal the ventilation hole 8; the shape memory alloy 10 is connected to the sealing member 17, and is used to drive the sealing member 17 away from the ventilation hole 8 so as to open the ventilation hole 8.

[0042] The shape memory alloy 10 used in the present invention is a two-way memory alloy, and its operating temperature can be set manually after reasonable taming, and the heat collection and heat dissipation effect of the heat collection and heat dissipation device should be considered. When the temperature in the heat collection and heat dissipation device is higher than the operating temperature, the shape memory alloy 10 stretches, and when it is lower than the operating temperature, the memory alloy contracts.

[0043] When in use, the solar device is fixed on the rotating device provided by the present invention, and the sealing member 17 seals the ventilation hole 8 on the heat collecting cover 9 at the beginning. As the heat collecting cover 9 is irradiated by sunlight, the temperature inside the heat collecting cover 9 gradually rises. When the operating temperature of the shape memory alloy 10 is reached, the shape memory alloy 10 stretches and gradually moves the active magnetic member 12 at its end closer to the driven magnetic member 15. Since the active magnetic member 12 and the driven magnetic member 15 have the same polarity, the two generate a repulsive force, which pushes the active wheel 1 to rotate in a direction away from the driven magnetic member 15. At this time, the driven wheel 3 remains stationary. At the same time, the active push rod 4 on the active wheel 1 contacts the driven spring 5 on the driven wheel 3 and gradually compresses the driven spring 5; when the shape memory alloy 10 stretches to a certain extent, it drives the sealing member 17 thereon to move, so that the sealing member 17 leaves the ventilation hole 8 of the heat collecting cover 9, the ventilation hole 8 is opened, and the heat dissipation of the heat collecting cover 9 begins. With the heat dissipation effect of the ventilation hole 8, the temperature inside the heat collecting cover 9 gradually decreases, the shape memory alloy 10 begins to shrink, and drives the active magnetic part 12 thereon away from the driven magnetic part 15, and the repulsive force between the two gradually decreases. Since the driven spring 5 is in a compressed state, the elastic force of the driven spring 5 begins to push the driven wheel 3 to rotate in the same direction as the rotation direction of the driving wheel 1, and the driven magnetic part 15 approaches the active magnetic part 12. And as the shape memory alloy 10 shrinks, the seal 17 thereon also moves at the same time, thereby sealing the ventilation hole 8 again. At this time, the rotating device completes a rotation action and drives the solar energy device thereon to rotate once at the same time. In this cycle, the rotating device continuously rotates in the same direction, so that the solar energy device continuously adjusts its position and always faces the direction of sunlight.

[0044] Since the active magnetic member 12 and the driven magnetic member 15 are arranged at different positions, the active wheel 1 in the present invention can rotate clockwise or counterclockwise (in the top view direction), and the user can select and set it according to the actual needs and the connection relationship between the solar device. Figure 2 For example, if the driven magnetic component 15 is located on the right side of the driving magnetic component 12, the driving wheel 1 will rotate in the clockwise direction.

[0045] The present invention adopts shape memory alloy 10 as a driving component, automatically rotates while tracking the sun, and is "motor-free" and "electrical-free". It does not require external strong or weak power input, an electric control system, or an additional power supply, and automatically tracks the sun, which is energy-saving and environmentally friendly. It does not require a complex control system, is simple to operate and maintain, is low in cost, and saves manpower and material resources. The action process is completed purely mechanically, which is safe and reliable.

[0046] Among them, when the active magnetic part 12 approaches the driven magnetic part 15, the repulsive force between the two can push the active wheel 1 to rotate in the direction away from the driven magnetic part 15, while the driven wheel 3 remains stationary. Therefore, there are corresponding requirements for the connection between the active wheel 1 and the driven wheel 3 and the fixed seat 6. For example, the force driving the active wheel 1 to start rotating is smaller than the force driving the driven wheel 3 to start rotating. The implementation method can be that the tightening force between the active wheel 1 and the fixed seat 6 is smaller than the tightening force between the driven wheel 3 and the fixed seat 6. For another example: the active wheel 1 and the driven wheel 3 are both rotatably connected to the fixed seat 6 through a flywheel, and the flywheel can make the active wheel 1 and the driven wheel 3 only rotate in the direction from the driven magnetic part 15 to the active magnetic part 12, so that when the driven wheel 3 is subjected to the repulsive force, it will not be pushed to rotate in the direction from the active magnetic part 12 to the driven magnetic part 15, thereby remaining stationary.

[0047] Preferably, a groove is provided on the driven wheel 3, and the driven spring 5 is located in the groove.

[0048] Preferably, the heat collecting device 2 includes a condenser 13 disposed on the top of the heat collecting cover 9; and / or, the heat collecting device 2 includes a sunshade 14 disposed on the top of the heat collecting cover 9; when the driving wheel 1 rotates, the sunshade 14 can block the sunlight from irradiating the condenser 13. The condenser 13 plays a role in focusing light, accelerating the increase in temperature in the heat collecting cover 9. When the driving wheel 1 rotates, the sunshade 14 blocks the condenser 13, so that the condenser 13 does not receive direct sunlight, and cooperates with the heat dissipation effect of the ventilation hole 8 to quickly achieve heat dissipation of the heat collecting cover 9.

[0049] The heat dissipation device includes a connecting rod 20, a return spring 19, and a fixing member 18 fixed to the driving wheel 1; the fixing member 18 is provided with a connecting hole 21; the connecting rod 20 is slidably penetrated in the connecting hole 21; the sealing member 17 is fixed at one end of the connecting rod 20, and one end of the return spring 19 abuts against the sealing member 17, and the other end of the return spring 19 abuts against the fixing member 18; when the shape memory contract pushes the sealing member 17 away from the vent 8, the return spring 19 is compressed. When the shape memory alloy 10 stretches, it pushes the sealing member 17 to move toward the driven magnetic member 15, the vent 8 is gradually opened, and the return spring 19 is compressed, and it is in the heat dissipation mode. When the driving wheel 1 rotates and the shape memory alloy 10 contracts, the sealing member 17 moves back under the action of the return spring 19, covers the vent 8 again, and is tightly pressed against the vent 8 by the elastic force of the return spring 19 to seal the vent 8, and it is in the heat collection mode. That is, when the ventilation holes 8 are opened, it is the heat dissipation mode, and when the ventilation holes 8 are closed, it is the heat collection mode. The above structure can realize the cyclic switching of the heat collection-heat dissipation mode, thereby promoting the rotation of the driving wheel 1, and the reset spring 19 can improve the sealing effect.

[0050] Preferably, a pusher 11 is fixed on the shape memory alloy 10, and the pusher 11 moves with the elongation of the shape memory alloy 10. When the pusher 11 reaches the position of the sealing member 17, the pusher 11 pushes the sealing member 17 to move. The pusher 11 can abut against the sealing member 17 through the ventilation hole 8, or can abut against the sealing member 17 through the through hole 16 on the heat collecting cover 9, thereby pushing the sealing member 17 to move.

[0051] The heat collecting cover 9 may be provided with ventilation holes 8 at only one end, or at both ends. Preferably, ventilation holes 8 are provided at both ends of the heat collecting cover 9; sealing members 17 are provided at both ends of the connecting rod 20; the sealing member 17 at one end is located inside the heat collecting cover 9, and the sealing member 17 at the other end is located outside the heat collecting cover 9; the two sealing members 17 are respectively located on the same side of the two ventilation holes 8, thereby sealing the two ventilation holes 8. Among them, one end of the connecting rod 20 is located inside the heat collecting cover 9, and the other end passes through the ventilation holes 8 and is located outside the heat collecting cover 9, so that the two sealing members 17 can be located on the same side of the ventilation holes 8, so that when the two sealing members 17 move in the same direction, the ventilation holes 8 at both ends can be opened at the same time. Specifically, the push member 11 pushes the seal 17 at one end to move, and can simultaneously drive the seal 17 at the other end to move.

[0052] The seal 17 can be arranged on the left or right side of the ventilation hole 8 according to the rotation direction of the driving wheel 1. Figure 2For example, the driving wheel 1 rotates clockwise, and the seal 17 is arranged on the right side of the ventilation hole 8. The return spring 19 is located between the seal 17 and the fixing member 18 on the left side, and the shape memory alloy 10 moves toward the right, pushing the seal 17 to move toward the right, and the return spring 19 is compressed.

[0053] The structure of the fixing member 18 can be various. For example, the fixing member 18 is fixed on the inner wall of the heat collecting cover 9 and is located above or below the driving wheel 1. Preferably, the fixing member 18 is annular; the fixing member 18 is sleeved outside the driving wheel 1 and fixed inside the heat collecting cover 9; the shape memory alloy 10 can reciprocate through the inner ring hole of the fixing member 18. The fixing member 18 is directly sleeved outside the driving wheel 1, which can make the structure compact, occupy a small space, and facilitate the installation of the fixing member 18. Preferably, the fixing member 18 is mesh-shaped, which can ensure that the ventilation holes 8 at both ends are connected smoothly and improve the heat dissipation efficiency.

[0054] The active magnetic component 12 and the driven magnetic component 15 may have various shapes. Preferably, the active magnetic component 12 and the driven magnetic component 15 are respectively an active magnetic ring and a driven magnetic ring; the active magnetic ring and the driven magnetic ring are both sleeved on the driving wheel 1 .

[0055] Preferably, a passive support rod 7 is fixed on the driven wheel 3; the driven magnetic ring is fixed on the passive support rod 7, so that the driven magnetic ring can be slidably connected to the driving wheel 1 and fixedly connected to the driven wheel 3, and the structure is simple.

[0056] The shape memory alloy 10 may be disposed above or below the driving wheel 1 . Preferably, the shape memory alloy 10 is in a spiral shape and is sleeved outside the driving wheel 1 .

[0057] The heat collecting cover 9 can have various shapes and can be arranged above or below the driving wheel 1. Preferably, the heat collecting cover 9 is cylindrical and has through holes 16 at both ends of the heat collecting cover 9. The heat collecting cover 9 is fixed on the driving wheel 1 through the through holes 16.

[0058] The shape of the seal 17 can be various. Preferably, the seal 17 is annular; the seal 17 is sleeved outside the driving wheel 1. As long as the seal 17 can cover the ventilation hole 8. The inner ring diameter of the seal 17 is larger than the diameter of the shape memory alloy 10, so that the seal 17 reciprocates outside the shape memory alloy 10.

[0059] In summary, Figure 1-Figure 4Take the structure of as an example, the left end of the shape memory alloy 10 is fixed to the driving wheel 1, and the right end is fixed to the active magnetic part 12; the driven magnetic part 15 is located on the right side of the active magnetic part 12, and the seal 17 is located on the right side of the ventilation hole 8; the reset spring 19 is located between the seal 17 at the left end and the fixed part 18; the driven spring 5 is located on the left side of the active push rod 4. The complete operation process of the rotating device provided by the present invention is: as the temperature in the heat collecting cover 9 increases, the right end of the shape memory alloy 10 moves toward the right, and the active magnetic part 12 at its right end gradually approaches the driven magnetic part 15, the repulsive force between the two gradually increases, and the driving wheel 1 is pushed to rotate in the clockwise direction, and the driven wheel 3 remains stationary. As the shape memory alloy 10 is extended, when the pusher 11 on it contacts the seal 17 at the right end, the pusher 11 pushes the seal 17 at the right end, the connecting rod 20 and the seal 17 at the left end to move to the right, the ventilation hole 8 is opened, and the reset spring 19 is compressed and is in a heat dissipation state. When the temperature drops, the shape memory alloy 10 contracts, and the return spring 19 restores the seal 17 to its original position, and the heat collection state begins again. This cycle causes the rotating wheel to continuously rotate a certain angle in the clockwise direction to adjust the position of the solar device.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotating device for tracking solar energy, characterized in that: It includes a fixed seat, a driving wheel and a driven wheel both in the shape of a circular ring, a driving device, a heat collecting device and a heat dissipating device; The driving wheel and the driven wheel are coaxially arranged and are both rotatably connected to the fixing seat; The driving device comprises a shape memory alloy, an active push rod, an active magnetic component and a driven magnetic component with the same magnetic poles; one end of the shape memory alloy is fixed to the active wheel, and the other end is fixed to the active magnetic component; the driven magnetic component is fixed to the driven wheel; when the other end of the shape memory alloy is extended and approaches the driven magnetic component, the repulsive force between the active magnetic component and the driven magnetic component can drive the active wheel to rotate; The driven wheel is provided with a driven spring; one end of the active driving rod is fixed to the driving wheel; when the driving wheel rotates, the other end of the active driving rod can abut against the driven spring and compress the driven spring; The heat collecting device comprises a heat collecting cover; the heat collecting cover is fixed to the driving wheel and covers the shape memory alloy; the heat collecting cover is provided with ventilation holes; The heat dissipation device comprises a sealing member slidably connected to the heat collecting cover; the sealing member is used to seal the ventilation hole; the shape memory alloy is connected to the sealing member and is used to drive the sealing member away from the ventilation hole so as to open the ventilation hole.

2. The rotating device for tracking solar energy according to claim 1, characterized in that: The heat collection device comprises a condenser arranged on the top of the heat collection cover; And / or, the heat collecting device includes a sunshade arranged on the top of the heat collecting cover; when the driving wheel rotates, the sunshade can block sunlight from shining on the concentrator.

3. The rotating device for tracking solar energy according to claim 1, characterized in that: The heat dissipation device includes a connecting rod, a return spring, and a fixing member fixed to the driving wheel; The fixing member is provided with a connecting hole; the connecting rod is slidably inserted into the connecting hole; the sealing member is fixed to one end of the connecting rod, and one end of the return spring abuts against the sealing member, and the other end of the return spring abuts against the fixing member; when the shape memory alloy pushes the sealing member away from the ventilation hole, the return spring is compressed.

4. The rotating device for tracking solar energy according to claim 3, characterized in that: Both ends of the heat collecting cover are provided with ventilation holes; both ends of the connecting rod are provided with sealing members; the sealing member at one end is located inside the heat collecting cover, and the sealing member at the other end is located outside the heat collecting cover; the two sealing members are respectively located on the same side of the two ventilation holes, thereby sealing the two ventilation holes.

5. The rotating device for tracking solar energy according to claim 3, characterized in that: The fixing piece is in the shape of a circular ring; the fixing piece is sleeved outside the driving wheel and fixed inside the heat collecting cover; the shape memory alloy can pass through the inner ring hole of the fixing piece to perform reciprocating motion.

6. The rotating device for tracking solar energy according to claim 1, characterized in that: The active magnetic component and the driven magnetic component are respectively an active magnetic ring and a driven magnetic ring; the active magnetic ring and the driven magnetic ring are both sleeved on the driving wheel.

7. The rotating device for tracking solar energy according to claim 6, characterized in that: A passive support rod is fixed on the driven wheel; and the driven magnetic ring is fixed on the passive support rod.

8. The rotating device for tracking solar energy according to claim 1, characterized in that: The shape memory alloy is in a spiral shape and is sleeved outside the driving wheel.

9. The rotating device for tracking solar energy according to claim 1, characterized in that: The heat collecting cover is cylindrical, and both ends of the heat collecting cover are provided with through holes; the heat collecting cover is fixed on the driving wheel through the through holes.

10. The rotating device for tracking solar energy according to claim 1, characterized in that: The sealing member is in the shape of a circular ring; the sealing member is sleeved outside the driving wheel.

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